EP4021346B1 - Intraocular lens having a specific, three-dimensionally curved haptic element - Google Patents

Description

Technical area

One aspect of the invention relates to an intraocular lens with a single optical part and with a haptic that is coupled to the optical part and with a main optical axis that penetrates a front and a back of the optical part, the haptic having a first haptic part, which is designed as a first ring and circumferentially around the optical part, and has at least one second haptic part, which is designed as a second ring and circumferentially around the optical part and which is elastically movable relative to the first haptic part, with at least one of the two rings in the circumferential direction is uneven around the main optical axis,

State of the art

Intraocular lenses are known in a variety of designs. Intraocular lenses usually have at least two separate haptics, which are designed opposite each other in the circumferential direction around the main optical axis and are designed radially adjacent to the optical part. More than two such separate haptics can also be formed, for example three haptics.

Intraocular lenses can be implanted at different defined positions in the eye instead of a natural lens of the eye. In this context, it is envisaged that specific intraocular lenses are implanted in an anterior chamber of the eye. For example, such anterior chamber lenses can be fixed in the anterior chamber angle.

In addition, intraocular lenses called iris clip lenses are known. Such intraocular lenses are attached to the pupil. In particular, they are clamped to the pupil opening. Such an intraocular lens is, for example, from DE 10 2007 057 122 A1 known. The intraocular lens there with this The specific implantation site in the eye has two opposing haptics. Each of these haptics has two L-shaped haptic arms. Mutually facing ends of these haptic arms are arranged facing each other, viewed in a plane perpendicular to the main optical axis of this intraocular lens, but arranged without contact and without overlap. By means of haptic arms formed in this way, the iris can be clamped through the gap formed, which is formed in the circumferential direction around the main optical axis between the ends of the haptic arms. However, such lenses are not intended or suitable for being implanted in a capsular bag of an eye.

In this regard, other specific intraocular lenses are known, which can be referred to as posterior chamber lenses and are implanted into a capsular bag of the eye.

From the DE 103 10 961 B4 an intraocular lens is known, which is a posterior chamber lens. In this rear chamber lens it is provided that two separate haptics are formed on opposite regions of the optical part radially adjacent to the optical part. Both respective haptics are designed with two haptic parts. The two haptic parts of a haptic can be moved relative to each other. For this purpose, a defined bend point, for example as a film hinge, is formed at a defined connection point between the haptic parts which are connected in one piece to one another. As a result, the radially outer haptic part of this haptic can be bent or folded relative to the first haptic part, which is directly connected to the optical part. This folding movement is only possible in the plane perpendicular to the optical axis. This is intended to reduce the radial width of the entire intraocular lens in order to avoid irritation inside the capsular bag caused by these haptics.

Such posterior chamber lenses have a more or less planar structure. This means that the capsular bag, which shrinks after implantation, comes into contact with the rear side of the optical part. Cell migration can occur at the contact surface, causing the posterior capsular bag to become cloudy. It is known that such clouding of the posterior capsular bag can be avoided or at least reduced if the back of the optical part the intraocular lens is surrounded by aqueous humor. This requires that there is a distance between the back of the optical part, the intraocular lens and the posterior capsular bag.

A spacing of a back side of the optical part of the intraocular lens from the capsular bag in the implanted state of the intraocular lens in the capsular bag is at DE 103 10 961 B4 not possible. Therefore, this posterior chamber lens does not solve the problem mentioned above.

From the US 2007/0100444 A1 an intraocular lens is known that has a three-dimensionally shaped haptic that is designed as a mesh. The haptics have several arcs that bulge radially to the main optical axis. These arches are arranged with their two ends at different positions in the direction of the main optical axis of the intraocular lens. One end of the arches is arranged on a peripheral side of the optical part of the intraocular lens. The second end of the arch protrudes axially forward over the optical part and is attached to a circular ring of the haptics. The circular ring is arranged completely in a surface plane which is arranged away from the optical part and is oriented perpendicular to the optical axis of the lens.

From the US 8,043,372 B2 an intraocular lens is known which also has a three-dimensionally shaped haptic, the shape of which does not extend in one plane. In one exemplary embodiment, this haptic has two rings encircling the main optical axis. These rings are each wavy in a meandering shape. The meander shape with its many loops is designed to run all the way around the main optical axis. The two rings are connected to one another at shaft reversal points, with the ring mountains located radially further inside being freely cantilevered and facing each other or facing the main optical axis.

Such three-dimensional haptics are intended to improve the secure holding of the intraocular lens in the capsular bag. However, these haptics are very complex in shape and therefore difficult to manufacture. The complexity of the shape also makes implanting the intraocular lens into the capsular bag more difficult. Furthermore, these have haptics also the problem that they pose due to their symmetry around the main optical axis

a capsular bag can be strongly compressed radially in some areas.

An intraocular lens according to the preamble of claim 1 is known US 4,804,361 A .

Presentation of the invention

It is the object of the present invention to create an intraocular lens that enables improved positioning in a capsular bag of an eye.

This task is solved by an artificial intraocular lens according to the features of the independent claim.

One aspect of the invention relates to an artificial intraocular lens with a single optical part. The optical part is a lens. The optical part has specific optical imaging properties so that specific corrections of visual defects can be carried out.

The intraocular lens also has a haptic that is coupled to the optical part. The intraocular lens has an optical axis or an optical main axis, which penetrates a front and a back of the optical part and in particular penetrates centrally. The haptic has a first haptic part, which is designed as a first ring. The first ring is formed all around the optical part. The haptic has at least a second haptic part, which is designed as a second ring. The second ring is formed all around the optical part. The two haptic parts can be moved elastically. At least one of the two rings is uneven when viewed in the circumferential direction around the main optical axis. This means that the ring is not formed in one plane along its longitudinal axis and thus along its ring shape, but rather its course is uneven in this regard. At least one of the two rings has exactly two ring valleys and exactly two ring mountains. Such a design creates a relatively simple geometry for this at least one haptic part. This has manufacturing advantages. In addition, such a design improves the retention of the intraocular lens in the capsular bag. In particular, both undesirable rotation of the intraocular lens in the capsular bag and undesirable tilting of the optical part can at least be reduced. With that you can an improved position fixation of the intraocular lens in the capsular bag can be made possible. With regard to the exactly two ring valleys and the exactly two ring mountains, this height designation is viewed with respect to a central plane of the optical part. This central plane is oriented perpendicular to the main optical axis and runs in particular centrally through the optical part. The ring valleys are located closer to this central plane than the ring mountains.

In addition, such a design also ensures that the intraocular lens can also be positioned in the capsular bag in a more secure position in the axial direction and thus in the direction of the main optical axis.

In an advantageous embodiment it is provided that the at least one ring with exactly two ring valleys and exactly two ring mountains has the shape of an edge ring or a border of a riding saddle shape. This means that, starting from a riding saddle shape, the relevant ring essentially represents a border or an edge of such a riding saddle shape. This ring can therefore also be referred to as a riding saddle shape edge ring. This specification also specifies the design with two ring valleys and exactly two ring mountains.

The shape of this ring with exactly two ring valleys and exactly two ring mountains can also be understood to mean that a ring formed in a plane is curved around an axis that is perpendicular to the main optical axis, thus creating this three-dimensional shape of the ring. This axis, around which this ring is curved, runs in particular in the central plane of the optical part.

Through this specific shape of the at least one ring with exactly two ring valleys and exactly two ring mountains, the above-mentioned advantages can be better taken into account. On the one hand, a very simple structure is made possible, but on the other hand, a targeted point connection with the optical part is still possible. This enables a high level of individual deformability of this ring, especially in the area of the ring mountains, and on the other hand creates a sufficient mechanical connection with the optical part.

In particular, it is provided that the at least one ring with its exactly two ring valleys opens into the optical part and is arranged with the ring mountains in a non-contact manner with the optical part. In particular, the ring with its exactly two ring valleys opens onto the optical part at two different points on the circumference. With such a design, only two direct mechanical connection points are formed between the ring and the optical part, namely by the two opposite ring valleys. This creates a symmetrical mechanical connection design between the ring and the optical part. This means that undesirable asymmetrical connections with the optical part can be avoided. Because there are only two mechanical connection points provided between the ring and the optical part, the production of the intraocular lens can be simplified. On the other hand, the shape complexity of the entire intraocular lens is also reduced.

The intraocular lens can be made in one piece. However, it can also be provided that the haptics and the optical part are separate components. In particular, the haptics can then be mechanically connected to the optical part. For example, a clamp connection or a plug connection or a snap connection can be formed between an edge region of the optical part and the haptic. For example, the haptics, in particular on the ring valleys, can have depressions on the inside, into which an edge region of the optical part engages and is held. However, an adhesive connection can also be provided.

In an advantageous embodiment, it is provided that the ring valleys are arranged in a first radius to the main optical axis when viewed in a projection view in the direction of the main optical axis and that the ring mountains are arranged in a second radius that is larger in comparison to the first radius in this projection view. In this projection view, the ring is not circular in its final position in the projection plane, but is deformed in this respect. In this context, the ring valleys are positioned further inwards than the ring mountains. The ring mountains are therefore radially further away from the main optical axis than the ring valleys. This particularly applies to viewing in the projection plane. This improves the elastic mobility of the ring, especially at the ring mountains. It can therefore be customized more individually Design of the capsular bag can be done and thus an even more finely adjusted and precise positioning of the intraocular lens in the capsular bag can be achieved. This deformation specification and these deformation properties are further improved precisely because of these ring mountains, which are positioned radially further outwards, which then also project freely and are designed without contact with the optical part and, when viewed in the direction of the main optical axis, are at a greater distance from a central plane than the ring valleys. Due to this advantage, the deformation adaptation to a wide variety of designs of capsular bags can also be improved and this in turn enables improved positioning of the intraocular lens in different capsular bags.

It is preferably provided that the at least one ring with exactly two ring valleys and exactly two ring mountains has a first partial ring which extends from the first ring valley over a first ring mountain to the subsequent second ring valley. A clear width of the partial ring, which is measured between the ring valleys, is at least 90 percent of the diameter of the optical part. In particular, this clear width is 100 percent or slightly more than 100 percent of this diameter. This configuration creates a partial ring whose span extends from the first ring valley to the second ring valley and in this respect represents a single U-shaped arc. This U-shaped arch therefore encloses the optical part in a first half-side circumferential region or spans this optical part. This can also be seen particularly in the projection plane mentioned above.

Preferably, two successive ring valleys, which immediately follow in the direction of the longitudinal axis of the ring on opposite sides to form a ring mountain, are offset by 180° in the circumferential direction around the main optical axis. They therefore lie on opposite sides in this azimuthal direction.

It is preferably provided that the at least one ring with exactly two ring valleys and exactly two ring mountains has a first partial ring which extends from the first ring valley over a first ring mountain to the subsequent second ring valley, the curvature of the first partial ring with respect to the optical Main axis is directed radially outwards. The direction of curvature is therefore first Partial ring, which represents a half ring, formed according to the curvature of the circumference of the optical part, in particular over its entire length. These directions of curvature are therefore in the same direction, but have different values. In particular, a partial ring is designed as an uneven, U-shaped arch. The U-opening faces the main optical axis.

In particular, this applies to the entire arc width between the two adjacent ring valleys of this first partial ring.

It is preferably provided that the ring mountains, viewed in the direction of the main optical axis, are at a greater distance from the central plane of the optical part than the ring valleys. In particular, it is provided that the first ring has the same shape as the second ring. In particular, it is provided that these two rings are arranged symmetrically to the central plane of the optical part. This means that the ring valleys in particular lie directly against one another and the ring mountains are arranged at the same azimuthal position in the circumferential direction around the main optical axis and are maximally spaced apart. This means that a distance that is dimensioned in the direction of the main optical axis varies in the circumferential direction around the main optical axis and is minimum at the positions of ring valleys of these two rings and is maximum at positions of the ring peaks of the two rings.

The optical part in particular has a center thickness. This center thickness is measured along the main optical axis and represents the largest thickness of the optical part. A thickness of the optical part is formed which is between the maximum of the curved front and / or the maximum of the curved back of the optical part and the central plane of the optical part viewed along the main optical axis. In particular, this thickness is half the center thickness of the optical part. In particular, in the non-implanted state of the intraocular lens, a distance of a ring mountain from the central plane, which is therefore dimensioned perpendicular to the central plane and is therefore viewed in the direction of the main optical axis, is greater than this thickness. This ensures in a particularly advantageous manner that in particular an upper side, in particular the back of the optical part in the implanted state in the eye, can be positioned at a distance from a capsular bag wall, in particular from the rear capsular bag wall.

It is preferably provided that the two haptic rings are arranged in the circumferential direction around the main optical axis at the same azimuth position with their two ring valleys. In particular, the two haptic rings or the first ring and the second ring are arranged in the circumferential direction around the main optical axis at the same azimuth position with their two ring mountains.

Preferably, it is provided that the rings are arranged relative to one another in such a way that they represent a radially outwardly directed open mouth or a mouth shape in the area of the ring mountains. Viewed in the radial direction, this mouth has the largest mouth opening at the radially outermost end. Starting from a respective ring valley in the circumferential direction around the main optical axis, these two rings increase in radius up to the other next ring valley and the distance between these two rings, viewed in the direction of the main optical axis, increases continuously up to the two ring mountains and then decreases the Ringbergen to the second ring valley that follows.

In an advantageous embodiment it is provided that the rings with their respective ring valleys on a peripheral wall of the optical part are connected directly to the optical part, in particular are formed in one piece with it. It can be provided that the adjacent ring valleys of the two rings are arranged adjacently at this specific azimuth position and without overlap or are designed to overlap with one another. The rings can also be designed in one piece with each other as a ring ensemble.

In an advantageous embodiment, it can be provided that the rings are designed as circular rings in their unfolded state into a plane, in which only the two-dimensional shape is then shown. When viewed in two dimensions in this regard, they can also be designed as oval rings in one plane.

Preferably, at least one of the two rings is designed to be uninterrupted in the circumferential direction and therefore completely closed. In an advantageous embodiment it is provided that an axial distance of a ring mountain of a ring to the central plane of the optical part is greater than a distance of a, in particular central, Curvature maximum of the optical part to the center plane. This makes it possible for the intraocular lens to be positioned in the capsular bag in such a way that the optical part is arranged at a distance from a capsular bag wall. This is particularly advantageous for a rear side of the optical part. This back side can then be arranged in the capsular bag at a distance from a rear wall of the capsular bag. This allows aqueous humor to get between this back and the posterior capsular bag. This can prevent the migration of cells and thus avoid clouding of the posterior capsular bag.

In particular, the intraocular lens is a posterior chamber lens for implanting into a capsular bag of an eye.

The intraocular lens proposed in this regard is foldable and can be positioned symmetrically in the capsular bag without causing axial displacements. The haptics specified in this regard can be individually adapted to the spatial conditions of the capsular bag in an improved manner. This makes it possible to avoid undesirable changes in the position of the optical part or the optical part of the intraocular lens. In particular, this design of the haptics also achieves improved rotational stability of the intraocular lens in the capsular bag.

In particular, the intraocular lens is formed in one piece from a polymer material.

In particular, the intraocular lens is designed as a capsular bag-implanting intraocular lens. In this context it can also be referred to as a capsular bag implantation intraocular lens. In particular, in this context it is a posterior chamber lens for implanting into a capsular bag of an eye. This means that the intraocular lens is intended, in particular only, for implantation into a capsular bag of an eye.

Further features of the invention emerge from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and/or shown in the figures alone not only in the specified combination, but also in other combinations, without departing from the scope of the invention. Embodiments that are not explicitly shown and explained in the figures, but which emerge from the explained embodiments and can be generated by separate combinations of features are therefore also to be regarded as included and disclosed by the invention. Versions and combinations of features are also to be regarded as disclosed, which therefore do not have all the features of an originally formulated independent claim. In addition, versions and combinations of features, in particular through the statements set out above, are to be regarded as disclosed, which go beyond or deviate from the combinations of features set out in the references to the claims.

The specific values of parameters and information on ratios of parameters or parameter values specified in the documents for defining exemplary embodiments of the eye lens are also included in the scope of the invention in the context of deviations, for example due to measurement errors, system errors, DIN tolerances, etc This also includes explanations that refer to essentially corresponding values and information.

Brief description of the drawings

Fig. 1

eine perspektivische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Intraokularlinse;

Fig. 2

eine perspektivische Darstellung eines Ausführungsbeispiels einer Haptik für eine Intraokularlinse;

Fig. 3

eine schematische Darstellung der Intraokularlinse gemäß Fig. 1 in einer Draufsicht in Richtung der optischen Hauptachse der Intraokularlinse;

Fig. 4

eine schematische Darstellung eines Rings der Haptik in einer zweidimensionalen Grundform, in welcher der Ring ein Kreisring ist;

Fig. 5

eine Darstellung gemäß Fig. 4, in welcher ein weiteres Ausführungsbeispiel eines Rings in einer Grundform als Ovalring dargestellt ist.

Fig. 6a

eine schematische Darstellung eines Ausführungsbeispiels einer Intraokularlinse, die in einen Kapselsack implantiert ist;

Fig. 6b

eine Darstellung gemäß Fig. 6a, in welcher die Intraokularlinse in einen zu Fig. 6a größeren Kapselsack implantiert ist; und

Fig. 6c

eine Darstellung gemäß Fig. 6a und 6b, in welcher die Intraokularlinse in einen nochmals größeren Kapselsack implantiert ist.

Exemplary embodiments of the invention are explained in more detail below using schematic drawings. Show it:

Fig. 1

a perspective view of an exemplary embodiment of an intraocular lens according to the invention;

Fig. 2

a perspective view of an exemplary embodiment of a haptic for an intraocular lens;

Fig. 3

a schematic representation of the intraocular lens according to Fig. 1 in a top view in the direction of the main optical axis of the intraocular lens;

Fig. 4

a schematic representation of a ring of the haptics in a two-dimensional basic shape, in which the ring is a circular ring;

Fig. 5

a representation according to Fig. 4 , in which a further embodiment of a ring is shown in a basic shape as an oval ring.

Fig. 6a

a schematic representation of an embodiment of an intraocular lens implanted in a capsular bag;

Fig. 6b

a representation according to Fig. 6a , in which the intraocular lens is turned into one Fig. 6a larger capsular bag is implanted; and

Fig. 6c

a representation according to 6a and 6b , in which the intraocular lens is implanted in an even larger capsular bag.

Preferred embodiments of the invention

In the figures, identical or functionally identical elements are given the same reference numerals.

In Fig. 1 an embodiment of an artificial intraocular lens 1 is shown in a perspective view. This intraocular lens 1 is a posterior chamber lens for implanting into a capsular bag of an eye. It can therefore also be referred to as a capsular bag implantation intraocular lens. The intraocular lens 1 has an optical part 2. The optical part 2 is designed as a lens. It is designed to generate a defined optical imaging property of the intraocular lens 1. The intraocular lens 1 has an optical axis or an optical main axis A. This penetrates a front side 3 of the optical part 2 and a back side 4 of the optical part 2 centrally and in the middle of the optical part 2.

The intraocular lens 1 has a haptic 5. In the exemplary embodiment shown, the haptic 5 is formed from two rings 6 and 7. In the exemplary embodiment, the first ring 6 is at least partially elastically deformable. The first ring 6 is uneven in the circumferential direction around the main optical axis A. This means that the first ring 6 with its entire shape or its entire geometry is not arranged in a single plane. Rather, the first ring 6 is formed as a three-dimensionally shaped ring. With regard to its three-dimensional shape, the first ring 6 has exactly two ring valleys 8 and 17. The first ring 6 also has exactly two ring mountains 9 and 10. The ring valleys 8 and 17 as well as the ring mountains 9 and 10 are particularly related to a central plane M ( Fig. 6a to 6c ) of the optical part 2 can be seen. This central plane M of the optical part 2 designed as a lens runs in particular centrally through this optical part 2 and is oriented perpendicular to the main optical axis A. Viewed in the direction of the main optical axis A, the two ring valleys 8 and 17 are therefore at a smaller distance from the central plane M than the ring mountains 9 and 10. In particular, it is provided that the ring valleys 8 and 17 are arranged offset from one another by 180° in the circumferential direction around the main optical axis A. The same is preferably designed for the ring mountains 9 and 10. The ring mountains 9 and 10 are formed along the longitudinal axis B of the first ring 9 at the same distance from the two ring valleys 8 and 17.

In particular, the first ring 6 has the shape of an edge ring of a riding saddle shape. In its position in the finished final state of the intraocular lens 1, the first ring 6 is designed as a circular ring or oval ring, which is curved around an axis that lies in the central plane M and is oriented perpendicular to the main optical axis A. This creates this riding saddle shape. It can also be provided that this end position of the first ring 6 is an annular section formed from a jacket wall of a hollow cylinder, this hollow cylinder having as a cylinder axis that which lies in the central plane M and is oriented perpendicular to the main optical axis A.

The first ring 6 is coupled with its ring valleys 8 and 17 to the optical part 2 on the circumference. In particular, it is directly connected to the optical part 2. The first ring 6 is arranged with its ring mountains 9 and 10 without contact with the optical part 2. These ring mountains 9 and 10, when viewed in the radial direction to the main optical axis A, can therefore project freely outwards.

As in the example in Fig. 1 It can also be seen that the haptic 5 in the exemplary embodiment has a second ring 11. This second ring 11 is also designed to be uninterrupted in the circumferential direction around the main optical axis A completely circumferential around the main optical axis A. In particular, it is provided that this second ring 11 also has exactly two ring valleys 12 and 13 and two ring mountains 14 and 15. The second ring 11 is preferably arranged relative to the first ring 6 such that in the circumferential direction around the main optical axis A, the two ring valleys 8 and 12 are arranged at the same azimuth position and the two ring valleys 17 and 13 are also arranged in the same azimuth position. In particular, the two rings 6 and 11 are designed and arranged such that the ring mountains 9 and 14 are arranged at the same azimuth position and the ring mountains 10 and 15 are arranged at the same azimuth position.

Otherwise, with regard to the shape and arrangement relative to the optical part 2, the same statements apply to the second ring 11 as were explained for the first ring 6.

In Fig. 2 the haptics 5 of the intraocular lens 1 are shown without the optical part 2 in a perspective view. The haptic 5 with the two rings 6 and 7 is formed in one piece here. The dashed dividing lines are to be understood here merely as auxiliary lines specifying the respective geometry of the rings 6 and 7. The rings 6 and 7 can also be designed separately.

In a top view, as shown in Fig. 3 is shown schematically and in which one looks at the intraocular lens 1 in the direction of the main optical axis A, it can be seen that the ring valleys 8 and 17 of the first ring 6 are arranged in a first radius r1 to the main optical axis A. This radius r1 is smaller than a radius r2. This second radius r2 represents the radial distance of the ring mountains 9 and 10 to the main optical axis A. The ring mountains 9 and 10 of the first ring 6 are therefore radially further away from the main optical axis A than the ring valleys 8 and 17. The same applies to the ring valleys 12 and 13 compared to the ring mountains 14 and 15 of the second ring 11.

In particular, it is provided that the first ring 6 has a first partial ring 6a, which extends from the first ring valley 8 over the first ring mountain 9 to the second ring valley 17. The curvature or the direction of curvature of this first partial ring 6a is directed radially outwards with respect to the main optical axis A. The first partial ring 6a thus represents in the projection view Fig. 3 represents a U-bend. It extends from one circumferential point of the optical part 2 to another Circumferential point of the optical part 2, which is offset by 180 ° in this regard. The same applies to a second partial ring 6b of the first ring 6. The two partial rings 6a and 6b together form the first ring 6. The same applies to a first partial ring 11a and a second partial ring 11b of the second ring 11.

A clear width L, which extends in a straight line between the ring valleys 8 and 17 and runs through the main optical axis A, is at least 90 percent, in particular at least 100 percent, of the diameter of the optical part 2. The same applies to a clear width between the ring valleys 12 and 13.

This first partial ring 6a is directed radially outwards with respect to its curvature relative to the main optical axis A. The same applies to the second partial ring 6b. The same applies to the curvatures or curvature directions of the partial rings 11a and 11b.

In a non-implanted basic state of the intraocular lens 1, the ring mountains 9 and 14 have a distance a1 which is dimensioned in the direction of the main optical axis A. This distance a1 is larger than a possibly existing distance between the ring valleys 8 and 12 and/or the ring valleys 17 and 13, measured in the direction of the main optical axis A. In particular, a corresponding distance a1 is also formed between the ring mountains 10 and 15. Viewed in the direction of rotation around the main optical axis A, a distance between the two rings 6 and 11 therefore varies from a minimum or a distance 0 at the ring valleys 8, 12 and 17, 13 to a respective maximum, which is determined by the distances a1 between the ring mountains 9, 14 and / or the ring mountains 10, 15 is formed.

In addition, it is provided that the ring mountains 9 and 10 of the first ring 6, viewed in the direction of the main optical axis A, have a greater distance from the central plane M in the optical part 2 than the ring valleys 8 and 17. In particular, this distance is half of the distance a1 . In particular, the same applies to the distances between the ring mountains 14 and 15 from this central plane M, in particular in relation to the ring valleys 12 and 13.

In particular, the two rings 6 and 11 are designed symmetrically to the central plane M.

In Fig. 4 an exemplary embodiment of a first ring 6 is shown. This ring 6 is shown in the plane of the figure and thus in comparison Fig. 1 opened up in this regard and thus just shown. In this unfolded flat representation it has the shape of a circular ring. In Fig. 5 In an alternative embodiment, the first ring 6 is shown in this plane of the figure and is therefore shown in an unfolded state and thus in a two-dimensional representation in comparison to the end position of an intraocular lens 1. This unfolded basic shape can be an oval ring in the top view. Corresponding shapes, as in the two-dimensional opened basic shape of the first ring 6 in Fig. 4 and Fig. 5 are shown, can also be designed for the second ring 11.

In Fig. 6a a schematic representation shows an implanted state of the intraocular lens 1 in a capsular bag 16. The relatively small capsular bag 16 here means that the ring mountains 9, 10, 14 and 15 are moved relatively strongly towards each other and are therefore elastically deformed in this regard. The optical part 2 has a center thickness D. This center thickness D is measured along the main optical axis A and represents the largest thickness of the optical part 2. A thickness that is measured between the front 3 and the center plane M along the main optical axis A represents half of this center thickness D. In particular In the non-implanted state of the intraocular lens 1, a distance of a ring mount 9, 10 from the central plane M, viewed in the direction of the main optical axis A, is greater than this distance D/2.

In particular, this configuration also makes it possible for the intraocular lens 1 in the implanted state in the capsular bag 6 to be arranged with its optical part 2 at a distance from the capsular bag walls, in particular a rear capsular bag wall. This means that aqueous humor can get between a back 4 and the rear capsular bag wall of the capsular bag 16.

In Fig. 6b In a further exemplary embodiment, the implanted state of the intraocular lens 1 in a capsular bag 16 'is shown. This capsular bag 16 'is different in size and/or shape from the capsular bag 16. Due to the elasticity and specific shape of the haptic 5, positioning is also possible therein in a secure and/or rotationally stable and/or tilt-free manner. Another representation an implanted state of the intraocular lens 1 in a capsular bag 16" which is again different in this regard is in Fig. 6c shown schematically.

Claims (10)

1. Intraocular lens (1) comprising a single optical part (2) and comprising a haptic (5) coupled to the optical part (2), and having a main optical axis (A) which passes through a front side (3) and a back side (4) of the optical part (2), the haptic (5) comprising a first haptic part which is in the form of a first ring (6) and encircles the optical part (2), and at least one second haptic part which is in the form of a second ring (11) and encircles the optical part (2) and which is elastically movable relative to the first haptic part, at least one of the two rings (6, 11) having an uneven form in the circumferential direction about the main optical axis (A),
   characterized in that
   at least one of the two rings (6, 11) has exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15).
2. Intraocular lens (1) according to Claim 1,
   characterized in that
   the at least one ring (6, 11) with the exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15) has the shape of an edge ring of a saddle form.
3. Intraocular lens (1) according to Claim 1 or 2, characterized in that
   the at least one ring (6, 11) merges with the optical part (2) with its ring valleys (8, 17, 12, 13) along the circumferential side and its ring peaks (9, 10, 14, 15) are arranged so as not to be in contact with the optical part (2).
4. Intraocular lens (1) according to any one of the preceding claims,
   characterized in that
   the ring valleys (8, 17, 12, 13) are arranged at a first radius (r1) with respect to the main optical axis (A) in the case of a projected view in the direction of the main optical axis (A) and the ring peaks (9, 10, 14, 15) are arranged at a second radius (r2) which is comparatively larger than the first radius (r1) in the case of this projected view.
5. Intraocular lens (1) according to any one of the preceding claims,
   characterized in that
   the at least one ring (6, 11) with the exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15) has a first ring portion (6a, 6b, 11a, 11b) which extends from the first ring valley (8, 12) over a first ring peak (9, 10, 14, 15) and up to the second ring valley (17, 13), a clear width (L) of the ring portion (6a, 6b, 11a, 11b) as measured between the ring valleys (8, 17, 12, 13) being at least 90% of the diameter of the optical part (2).
6. Intraocular lens (1) according to any one of the preceding claims,
   characterized in that
   the at least one ring (6, 11) with the exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15) has a first ring portion (6a, 6b, 11a, 11b) which extends from the first ring valley (8, 12) over a first ring peak (9, 10, 14, 15) and up to the second ring valley (17, 13), the curvature of the first ring portion (6a, 6b, 11a, 11b) being directed radially to the outside in relation to the main optical axis (A).
7. Intraocular lens (1) according to any one of the preceding claims,
   characterized in that
   the ring peaks (9, 10, 14, 15) have a greater distance from the central plane (M) of the optical part (2) than the ring valleys (8, 17, 12, 13) when considered parallel to the main optical axis (A).
8. Intraocular lens (1) according to any one of the preceding claims,
   characterized in that
   the first ring (6) has the same shape as the second ring (11) and the rings (6, 11) are arranged symmetrically in relation to the central plane (M) of the optical part (2) .
9. Intraocular lens (1) according to Claim 8,
   characterized in that
   the rings (6, 11), by way of their respective ring valleys (8, 17, 12, 13), are directly connected to the optical part (2), in particular formed in one piece therewith, at a circumferential wall of the optical part (2).
10. Intraocular lens (1) according to any one of the preceding claims,
    characterized in that
    the intraocular lens (1) is a posterior chamber lens for implantation into a capsular bag (16, 16', 16") of an eye.

Images